A Fennec addon. I may be wrong, but from what I understand, Fennec is a lot like Firefox internally, but with a completely different UI. A sidebar is probably not feasible, but a Fennec version of "Toodledo this page" would be awesome, and might not be difficult to make from the FF addon. Anyway, I know it is not going to be a high priority item given the currently small user base, but I am lucky enough to have one of the phones that can run the beta of Fennec, and it is really going to be a breakthrough in mobile browsing. It would be cool if Toodledo could get in on the ground floor.